Affiliations: College of Resources and Environmental Sciences,
Chinese Agricultural University, Beijing 100094, China | Institute of Geographical Sciences and Natural
Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Abstract: This paper presented the characteristics of nitrogen and phosphorus
pollution in Beijing surface water during the survey. A significant difference
was found out in concentration distribution of various parameters of nitrogen
and phosphorus. Most water bodies in five water systems were polluted by total
nitrogen with the content even up to 120 mg/L which was higher than exceeded
the fifth class standard of national surface water quality standard GB3838-2002
except for several segments of Chaobaihe and Yongdinghe. Ammonia and phosphorus
showed a similar tendency of distribution with higher content in Daqinghe,
Beiyunhe and Jiyunhe water systems, but with relatively low concentrations in
Chaobaihe and Yongdinghe water systems. Meanwhile, nitrate was found at
comparatively low content (mostly less than 10 mg/L) and could fit for
corresponding water quality requirements. Totally, the water quality of
Daqinghe, Jiyunhe and Beiyunhe river systems as well as the lower reaches of
Yongdinghe and Chaobaihe was contaminated seriously with high content of total
nitrogen and phosphorus. Through multivariate statistical approaches, it can be
concluded that total nitrogen, ammonia and total phosphorus was highly
correlated to chemical oxygen demand, biochemical oxygen demand, dissolved
oxygen and electrical conductivity, which explained the same pollution source
from anthropogenic activities.
